Transcript for Rising Democratic nominee Pete Buttigieg set to hold big campaign event
Also in politics this morning, the 2020 race is heating up. In just a few hours, Democrat Pete buttigieg is expected to officially kick off his presidential campaign. ABC chief national correspondent Matt Gutman is in South Bend, Indiana, with a look at mayor Pete and the momentum he's building. Matt, good morning. Reporter: Hey, whit, good morning. Mayor Pete is making that big announcement today. The biggest nonsecret in politics. Now, in elections voters are often looking for the opposite of the incumbent and Pete buttigieg is offering himself up as the anti-Trump. In his words, an intellectual, laidback, gay mayor from the midwest, half the age of the president. Let me introduce the mayor, Pete buttigieg. Reporter: The unpronounceable name now a household name. All eyes are on South Bend mayor Pete buttigieg. Pete buttigieg. Reporter: It's a candidacy full of firsts. First mayor to win a nomination. The first openly gay man in office. The first president under 40. The 37-year-old with a boy scout looks has cultivated quite a mayor. Harvard, Rhodes scholar. Oxford. Mckinsey consulting firm. And a U.S. Navy reserve officer. Earning a medal for his counterterrorism work. He's been slightly vague on political platform. In his interview with George Stephanopoulos, described his plan for medicare. A version of medicare, anyone who wants to buy into it buy into it. If that's a preferred option, very naturally becomes a glide path to a medicare for all. Reporter: As a devote episcopolian, he's gained attention for his fight with Mike pence. The freedom of religion with every American. I'm not interested in feuding with the vice president. If he wanted to clear this up, he could come out today he changed his mind and say that it shouldn't be legal to discriminate against anyone in this country. Reporter: Last night I asked for an advance copy for his written remarks for today. He's not writing them out. Even his own aides don't know what he's going to say. He's obviously been thinking about this for some time. He'll be talking in front of his hometown crowd here, right inside that old Studebaker factory. No prepared statements. So, in at least that way Dan, a little bit like president trump. Fair point. It may end there. Matt, thank you very much. Matt Gutman on the ground in Indiana. Lot to talk about, let's bring in George Stephanopoulos. Who will be hosting "This week." So, I mean, you've been around, I don't want to date you, you've been around for politics -- You just did. You've watched candidates come and go in big, crowded fields. I was thinking this morning about Lamar Alexander in 1996, wearing his played shirts, obviously dole took it. Do you think this Lamar Alexander in 1996 or Barack Obama in 2008? What we know about Pete buttigieg, he brought his way on the debate stage. He's rising in the polls, guarantees he'll be in those all-important first debates that start this summer. Right there that gives him a leg up. He'll have enough money to make it at least through those early primaries because he's building this online presence. And I think what we have seen so far, he has thought about this a lot. He knows what he wants to say. He knows how to communicate his ideas and he knows how to do it in a way that appeals to the democratic base without -- often without turning off those who might be on the other side. He's got all the skills. Whether he can all the way, nobody knows. He's certainly got some momentum. Both these people came out of nowhere in crowded fields. Let's talk about immigration. You got the president's press secretary Sarah Sanders on the show tonight. This plan to bus migrants to sanctuary cities. Before we came on the air, we talked about this article in the associated press this morning that makes the point this plan, the winners could be the migrants, they'll end up in place where they're protected from the feds, welcome, given that, do you think this is truly a serious plan? The president is clearly pushing it. The department of homeland security has rejected it at least twice. The president is driving this forward. As you point out, it seems to run counter to the policy that the president wants. It would actually encourage more migrants to stay longer, to come and put down roots. He seems to be acting on the idea that this is punishing cities run by Democrats. That's the mindset he's coming at this from. Whether he can get this done or paid for, whether it's legal, all big questions on the table. Well, I'm interested to learn more on your show this morning. Thank you very much. Reminder, George has a big show, as discussed, he'll go one-on-one with the white house press secretary Sarah Sanders. Plus, Democrat congressman Tim Ryan on jumping in the 2020 presidential run. That's all coming up on "This week" on ABC. George, thanks again.
This transcript has been automatically generated and may not be 100% accurate.